/**
 * #      1624
 * 名称   两个相同字符之间的最长子字符串
 * 链接   https://leetcode-cn.com/problems/largest-substring-between-two-equal-characters
 * 题解   [143](https://leetcode-cn.com/problems/largest-substring-between-two-equal-characters/solution)
 * 通过率 62.5%
 * 难道   简单
 */

